José Luis Alaniz-Arcos, Xochiquetzalli Tejeda Castellanos, Carlos Maximiliano Sánchez Medina, Horacio Márquez González, Ma Elena Ortiz Cornejo, Juliette Marie Brito Suárez, Claudia Gutiérrez Camacho
BACKGROUND: Peripheral neuropathy due to chemotherapeutic drugs causes alterations in ankle movement during gait. This study aimed to describe the spatiotemporal parameters and ankle kinematics during gait in schoolchildren with acute lymphoblastic leukemia with clinically suspected peripheral neuropathy. METHODS: In children with acute lymphoblastic leukemia in the maintenance phase, we calculated spatiotemporal and kinematic parameters of the ankle during gait using Kinovea® software...
May 9, 2024: Clinical Biomechanics
Breanna R Dumke, Lauren H Theilen, Janet M Shaw, K Bo Foreman, Leland E Dibble, Peter C Fino
BACKGROUND: Approximately 25% of pregnant people fall, yet the underlying mechanisms of this increased fall-risk remain unclear. Prior studies examining pregnancy and balance have utilized center of pressure analyses and reported mixed results. The purpose of this study was to examine sensory and segmental contributions to postural control throughout pregnancy using accelerometer-based measures of sway. METHODS: Thirty pregnant people (first trimester: n = 10, second trimester: n = 10, third trimester: n = 10) and 10 healthy, nonpregnant control people stood quietly for one minute in four conditions: eyes open on a firm surface, eyes closed on a firm surface, eyes open on a foam pad, and eyes closed on foam...
May 9, 2024: Clinical Biomechanics
Keita Honda, Yusuke Sekiguchi, Dai Owaki, Ryusuke Okamoto, Shino Inuzuka, Norihiro Morimoto, Shin-Ichi Izumi
BACKGROUND: Reduced ankle quasi-joint stiffness affects propulsion in the paretic side of patients with hemiparesis, contributing to gait asymmetry. We investigated whether the use of an ankle-foot orthosis with dorsiflexion resistance to compensate for reduced stiffness would increase quasi-joint stiffness and spatiotemporal symmetry in patients with hemiparesis. METHODS: Seventeen patients walked along a 7-m walkway in both ankle-foot orthosis with dorsiflexion resistance and control (i...
May 9, 2024: Clinical Biomechanics
Daisuke Nishiyama, Satoshi Arita, Daisuke Fukui, Manabu Yamanaka, Hiroshi Yamada
BACKGROUND: Falls among the elderly are a major societal problem. While observations of medium-distance walking using inertial sensors identified potential fall predictors, classifying individuals at risk based on single gait cycles remains elusive. This challenge stems from individual variability and step-to-step fluctuations, making accurate classification difficult. METHODS: We recruited 44 participants, equally divided into high and low fall-risk groups. A smartphone secured on their second sacral spinous process recorded data during indoor walking...
May 8, 2024: Clinical Biomechanics
Sébastien Leteneur, Mathias Blandeau, Franck Barbier, Nader Farahpour, Paul Allard
No abstract text is available yet for this article.
May 4, 2024: Clinical Biomechanics
G E Giddins, S Sassi
BACKGROUND: The aim was to assess the direction of distal radius fractures and their relationship to the ulnar head. METHODS: We reviewed the 160 wrist radiographs. The fracture line was measured on the postero-anterior and lateral radiographs relative to the long axis of the forearm and the relationship to the ulnar head. FINDINGS: PA radiographs: the fracture line ran distal ulnar to proximal radial (ulnar to radial) in 11%, transverse in 74% and distal radial to proximal ulnar (radial to ulnar) in 16%...
May 3, 2024: Clinical Biomechanics
Elke Warmerdam, Dominik Horn, Ramona Filip, Kolja Freier, Bergita Ganse, Carolina Classen
BACKGROUND: The ability to walk safely after head and neck reconstruction with fibular free flaps in tumor surgery is a high priority for patients. In addition, surgeons and patients require objective knowledge of the functional donor-site morbidity. However, the effects of fibular free flap surgery on gait asymmetries have only been studied for step length and stance duration. This study analyses whether patients who have undergone fibular free flap reconstruction have enduring gait asymmetries compared to age-matched controls...
May 1, 2024: Clinical Biomechanics
Shuai Wang, Junzhe Gao, Liangpeng Lai, Xiaojing Zhang, Xiaofeng Gong, Heng Li, Yong Wu
BACKGROUND: The majority of the ankle osteoarthritis cases are posttraumatic and affect younger patients with a longer projected life span. Hence, joint-preserving surgery, such as supramalleolar osteotomy becomes popular among young patients, especially those with asymmetric arthritis due to alignment deformities. However, there is a lack of biomechanical studies on postoperative evaluation of stress at ankle joints. We aimed to construct a verifiable finite element model of the human hindfoot, and to explore the effect of different osteotomy parameters on the treatment of varus ankle arthritis...
April 30, 2024: Clinical Biomechanics
Jonas L Markström, Yevgenia Grinberg, Gisela Sole, Charlotte K Häger
BACKGROUND: Individuals with a recent anterior cruciate ligament reconstruction may demonstrate an altered movement strategy for protecting the knee and maintaining stability. Altered knee movement might lead to abnormal intra-articular load, potentially contributing to early knee osteoarthritis onset. A protective strategy may be particularly evident during active tasks that induce a pivot-shift manoeuvre, such as a step-down and cross-over task. In this study, we investigated whether knee joint mechanics and muscle activity differed between participants early (∼3 months) following reconstruction (n = 35) to uninjured controls (n = 35) during a step-down and cross-over task with a 45° change-of-direction...
April 23, 2024: Clinical Biomechanics
Elanna K Arhos, Jonathan M Wood, Karin Grävare Silbernagel, Susanne M Morton
BACKGROUND: Rupturing the anterior cruciate ligament is an orthopedic injury that results in neuromuscular impairments affecting sensory input to the central nervous system. Traditional physical therapy after anterior cruciate ligament reconstruction aims to rehabilitate orthopedic impairments but fails to address asymmetric gait mechanics that are present post-operatively and are linked to the development of post-traumatic osteoarthritis. A first step towards developing gait interventions is understanding if individuals after anterior cruciate ligament reconstruction have the capacity to learn new walking mechanics...
April 23, 2024: Clinical Biomechanics
Özlem Karasimav, Pınar Borman, Meltem Dalyan, Elif Yalçin, Zahide Betül Eliuz, İpek Poyraz, Seren Türk
BACKGROUND: The impact of lower-limb-lymphedema on quality of life of patients regarding balance is unclear due to the scarcity of literature. The aim of this study was to determine the static and dynamic balance of patients with lower-limb-lymphedema in comparison with healthy subjects. METHODS: This case-control designed study included 30 lymphedema patients and 30 healthy individuals, of whom were 52 female and 8 male with a mean age of 50.63 ± 9...
April 20, 2024: Clinical Biomechanics
Brian Horsak, Sebastian Durstberger, Philipp Krondorfer, Alexandra Thajer, Susanne Greber-Platzer, Andreas Kranzl
BACKGROUND: This study investigated the most accurate method for estimating the hip joint center position in clinical 3D gait analysis for young individuals with high amounts of soft tissue. We compared position estimates of five regression-based and two functional methods to the hip joint center position obtained through 3D free-hand ultrasound. METHODS: For this purpose, the data of 14 overweight or obese individuals with a mean age of 13.6 (SD 2.1 yrs) and a BMI of 36...
April 18, 2024: Clinical Biomechanics
Yorihide Yanagita, Shinichi Arizono, Yuichi Tawara, Masaki Oomagari, Hikaru Machiguchi, Masayuki Tanahashi, Norimasa Katagiri, Yuki Iida, Ryo Kozu
BACKGROUND: Lung resection is the standard of care for patients with clinical stage I/II non-small cell lung cancer. This surgery reduces both the duration and quality of patients' daily ambulatory activities 1 month after surgery. However, little is known about physical activity after lung resection in patients with lung cancer. To evaluate the recovery process of physical activity with pulmonary rehabilitation in patients after lung resection and examine whether physical activity is affected by age...
April 13, 2024: Clinical Biomechanics
Sabina Manz, Thomas Schmalz, Michael Ernst, Thomas Maximilian Köhler, Jose Gonzalez-Vargas, Strahinja Dosen
BACKGROUND: Lower limb amputation does not affect only physical and psychological functioning but the use of a prosthetic device can also lead to increased cognitive demands. Measuring cognitive load objectively is challenging, and therefore, most studies use questionnaires that are easy to apply but can suffer from subjective bias. Motivated by this, the present study investigated whether a mobile eye tracker can be used to objectively measure cognitive load by monitoring gaze behavior during a set of motor tasks...
April 12, 2024: Clinical Biomechanics
Magdalena Stania, Ewa Emich-Widera, Anna Kamieniarz-Olczak, Beata Kazek, Martyna Swatowska-Wenglarczyk, Grzegorz Juras
BACKGROUND: Instrumented measurements of postural control provide a more accurate insight into the motor development of children with autism. This study aimed to identify postural control deficits in autistic children during quiet standing before and after transient locomotor task. It was hypothesized that the parameters that characterize the trajectory of center of foot pressure (COP) displacement would be higher in autistic children compared to typically developing children. METHODS: Sixteen autistic children aged 6-10 but without a comorbidity diagnosis, were enrolled in the study group...
April 12, 2024: Clinical Biomechanics
James W Scott, K C Geoffrey Ng, Alexander D Liddle, Jonathan R T Jeffers
BACKGROUND: Knowing the mechanical properties of trabecular bone is critical for many branches of orthopaedic research. Trabecular bone is anisotropic and the principal trabecular direction is usually aligned with the load it transmits. It is therefore critical that the mechanical properties are measured as close as possible to this direction, which is often perpendicular to a curved articulating surface. METHODS: This study presents a method to extract trabecular bone cores perpendicular to a curved articulating surface of the distal femur...
April 10, 2024: Clinical Biomechanics
Krishnan Sircar, Maximilian Weber, Sebastian G Walter, Nadine Ott, Andreas Prescher, Peer Eysel, Nikolaus Kernich
BACKGROUND: The application of expandable titanium-cages has gained widespread use in vertebral body replacement for indications such as burst fractures, tumors and infectious destruction. However, torque forces necessary for a satisfactory expansion of these implants and for subsidence of them into the adjacent vertebrae are unknown within the osteoporotic spine. METHODS: Six fresh-frozen human, osteoporotic, lumbar spines were dorsally instrumented with titanium implants (L2-L4) and a partial corpectomy of L3 was performed...
April 9, 2024: Clinical Biomechanics
Do Weon Lee, Hyuk-Soo Han, Du Hyun Ro
BACKGROUND: High tibial osteotomy is an established surgical option for medial compartment osteoarthritis of the knee with varus alignment. It can be divided into open wedge and closing wedge by operative technique. Although they have fundamental differences, little is known about the biomechanical consequences of the two surgical methods. METHODS: Thirty-eight patients with medial compartment osteoarthritis who underwent high tibial osteotomy (19 open-wedge and 19 closing-wedge) were retrospectively reviewed...
April 5, 2024: Clinical Biomechanics
R Jamil Pugh, Rosemary D Higgins, Hua Min, Clinton J Wutzke, Andrew A Guccione
BACKGROUND: Individuals with Parkinson's disease are challenged in making turns while walking, evidenced by reduced intersegmental coordination and reduced dynamic postural stability. Although overground locomotor training previously improved ambulation among people with Parkinson's disease, its effect on walking turns remained unknown. We sought to understand the effects of overground locomotor training on walking turns among individuals with mild-Parkinson's disease. METHODS: Twelve participants with Parkinson's (7 Males/5 Females; Age: 68...
April 3, 2024: Clinical Biomechanics
S P Shultz, S M Kung, A C Atack, A N Buck, R Mahaffey
BACKGROUND: Obesity impacts a child's ability to walk with resulting biomechanical adaptations; however, existing research has not comprehensively compared differences across the gait cycle. We examined differences in lower extremity biomechanics across the gait cycle between children with and without obesity at three walking speeds. METHODS: Full gait cycles of age-matched children with obesity (N = 10; BMI: 25.7 ± 4.2 kg/m2 ) and without obesity (N = 10; BMI: 17...
March 29, 2024: Clinical Biomechanics
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